| Business | Phone |
| A & A Backflow Discount Test Phoenix 85004 | (602) 252-0211 |
| Abs Arizona Backflow Spec 2110 W Meadow Dr, Phoenix 85023 | (602) 548-1101 |
| Backflow Prevention Device Inc 15840 N 32nd St # 4, Phoenix 85032 | (602) 788-5411 |
| Bpdi 3801 E Roeser Rd # 11, Phoenix 85040 | (602) 788-5411 |
| Cross Connection Environmental 2934 W Fairmount Ave, Phoenix 85017 | (602) 438-4869 |